added comments to describe functions,'

main.py

@@ -3,6 +3,7 @@ import os
 from openai import OpenAI 
 from pytube import YouTube
 
+# Downloads the audio from a YouTube video.
 def download(video_url, output_filename='audio.mp4'):
     try:
         print("Downloading audio...")
@@ -15,6 +16,7 @@ def download(video_url, output_filename='audio.mp4'):
         print(f"Failed to download audio: {e}")
         return None
 
+# Transcribes the audio file using OpenAI's transcription service.
 def transcription(OPENAI_API_KEY, audio_filename):
     try:
         print("Transcriptiting audio...")
@@ -33,6 +35,7 @@ def transcription(OPENAI_API_KEY, audio_filename):
         print(f"Failed to transcript audio: {e}")
         return None
 
+# Generates a summary for a given transcript using GPT-4.
 def summary(OPENAI_API_KEY, transcript):
     try:
         print("Summarizing transcript...")
@@ -55,15 +58,17 @@ def summary(OPENAI_API_KEY, transcript):
         print(f"Failed to summarize transcript: {e}")
         return None
 
+# Deletes the specified audio file.
 def cleanup(audio_filename):
     try:
         print("Deleting audio...")
         os.remove(audio_filename)
-        print(f"Deleted audio: {audio_filename}")
+        print(f"Deleted audio.")
     except Exception as e:
         print(f"Failed to delete audio: {e}")
         return None
 
+# Main function to orchestrate the download, transcription, summarization, and cleanup process.
 def main():
     try:
         OPENAI_API_KEY = os.environ.get('OPENAI_API_KEY')